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Highly-hydrophilic adsorbent as well as preparation and application to absorption of rubidium ions or lithium ions

An adsorbent and hydrophilic technology, applied in the field of adsorbent preparation, can solve problems such as dissolution and instability, and achieve the effects of fast analysis rate, improved production efficiency, and fast adsorption rate

Active Publication Date: 2018-08-24
西安金藏膜环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the defects and deficiencies of the existing preparation technology, the purpose of the present invention is to provide a highly hydrophilic adsorbent, preparation and application of rubidium ions or lithium ions, and solve the problem of repeated use of the adsorbent prepared by hydrophilic materials. Susceptible to instability issues due to material dissolution

Method used

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  • Highly-hydrophilic adsorbent as well as preparation and application to absorption of rubidium ions or lithium ions
  • Highly-hydrophilic adsorbent as well as preparation and application to absorption of rubidium ions or lithium ions

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preparation example Construction

[0027] The preparation method of a kind of highly hydrophilic adsorbent of the present invention, first, powdery lithium or rubidium ion adsorbent is added in the aqueous solution of hydrophilic polymer, fully stirs and mixes and drips into the phase inversion agent in the form of droplet In this method, the nascent adsorbent in the form of a sphere is formed by solution phase inversion; then, the nascent spherical adsorbent is added to the toluene-2,4-diisocyanate solution with n-hexane as the solvent for chemical cross-linking reaction , to obtain a highly hydrophilic adsorbent.

[0028] The highly hydrophilic adsorbent prepared by the present invention is mainly used for absorbing and extracting rubidium ions or lithium ions from seawater, brine, lepidolite acid leaching lithium raffinate, lithium carbonate precipitation and lithium raffinate, etc.

Embodiment 1

[0031] Carboxymethyl cellulose was prepared into 10 mL of an aqueous solution with a mass concentration of 6%, and then 0.6 g of manganese-based lithium ion sieve adsorbent was added; stirred evenly to form a viscous state, manually pressed out with a syringe and dropped into the phase inversion agent tetrahydrofuran solution , after 3 minutes of phase inversion reaction, it becomes a spherical solid particle, and the nascent lithium ion spherical adsorbent is obtained.

[0032] Take out the nascent spherical adsorbent and dry it at 60°C, place it in a n-hexane solution of toluene-2,4-diisocyanate with a concentration of 1% by mass and volume at 30°C, and take it out after reacting for 30 minutes. A spherical highly hydrophilic lithium ion adsorbent is obtained. The morphology of the adsorbent is as figure 1 said, figure 1 (a) is a 500-fold magnified topography of the adsorbent surface, figure 1 (b) is the 1000 times magnified topography image of the adsorbent surface.

[...

Embodiment 2

[0035] Take 4% aqueous solution of hydroxyethyl cellulose, take 10mL and add 0.48g of manganese-based lithium ion sieve adsorbent to it, mix and stir evenly to become viscous, manually press out with a syringe and drop into the phase inversion agent ether solution , after 3 minutes of phase inversion reaction, it becomes a spherical solid particle, and the nascent lithium ion spherical adsorbent is obtained.

[0036] Place the nascent spherical adsorbent at 30°C in a n-hexane solution of toluene-2,4-diisocyanate with a mass concentration of 1.5%, take it out after reacting for 30 minutes, and obtain a spherical highly hydrophilic lithium ion adsorbent . The morphology of the adsorbent is as figure 2 said, figure 2 (a) is a 500-fold magnified topography of the adsorbent surface, figure 2 (b) is the 1000 times magnified topography image of the adsorbent surface.

[0037] The prepared spherical lithium ion adsorbent is loaded into the adsorption column for the preparation ...

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Abstract

The invention discloses a highly-hydrophilic adsorbent as well as preparation and application to absorption of rubidium ions or lithium ions. The preparation method of the highly-hydrophilic adsorbentis characterized in that a lithium ion sieve or a rubidium ion exchanger is added in an aqueous solution of a hydrophilic polymer, is fully stirred and mixed and drops in a phase conversion agent ina form of droplets; and after a primary ecological adsorbent in a form of a sphere is formed by solution phase transformation, the chemical cross-linking reaction is performed in an oil phase solutionof diisocyanate to obtain the highly-hydrophilic adsorbent. The adsorbent disclosed by the invention has the benefits that the ion exchange conditions of a lithium ion and rubidium ion adsorbent areensured due to high hydrophilic capacity, and the problem of solution loss of the adsorbent in the repeated use is solved; the preparation method is simple, and the preparation and the regulation aremild; the adsorbent prepared by the preparation method disclosed by the invention is higher in absorption and desorption speed.

Description

technical field [0001] The invention belongs to the technical field of adsorbent preparation, and in particular relates to a highly hydrophilic adsorbent, its preparation and application for adsorbing rubidium ions or lithium ions. Background technique [0002] Lithium metal and its compounds play an increasingly important role in the national economy and national defense construction. More than 80% of lithium resources are stored in salt lake brine and seawater. Therefore, the research on lithium extraction from salt lake brine is of great importance to the development and utilization of lithium resources. strategic significance. The extraction of lithium by ion sieve adsorption has the characteristics of high cycle stability, high selectivity, high adsorption capacity, and low cost. It has become one of the most industrially promising methods for extracting lithium from salt lake brine in my country. However, because the ion sieve adsorbent is mostly powder, its fluidity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/10
CPCB01J20/0218B01J20/0259B01J20/06B01J20/24B01J2220/46B01J2220/4806B01J2220/4812B01J2220/4825C02F1/281C02F1/285C02F2101/10
Inventor 王磊孟晓荣黄丹曦陈铖乔茹楷霍姗姗
Owner 西安金藏膜环保科技有限公司
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